#ifndef LINE_H_
#define LINE_H_

#include "Vertex.h"
#include <math.h>


#define INTERSECTION_ERROR           -1
#define INTERSECTION_NONE             0
#define INTERSECTION_IDENTICAL        1
#define INTERSECTION_LINE             2
#define INTERSECTION_LINE_LINE        2
#define INTERSECTION_LINE_SEGMENT     3
#define INTERSECTION_SEGMENT_LINE     6
#define INTERSECTION_SEGMENT_SEGMENT  7

class Line {
  private:
    Vertex v1, v2;
  public:
    Line() {}
    Line(const Vertex& v1, const Vertex& v2) {
      this->v1 = v1; this->v2 = v2;
    }
    Line(double x1, double y1, double x2, double y2) {
      v1.setLocation(x1, y1);
      v2.setLocation(x2, y2);
    }
    
    Vertex &getVertex1() {return v1;}
    const Vertex &getVertex1() const {return v1;}
    void setVertex1(const Vertex &v) {v1 = v;}
    
    Vertex &getVertex2() {return v2;}
    const Vertex &getVertex2() const {return v2;}
    void setVertex2(const Vertex &v) {v2 = v;}
    
    double lengthSq() const {return v1.distanceSq(v2);}
    double length() const {return sqrt(lengthSq());}
    
    bool contains(const Vertex &v) const;
    
    int intersects(const Line &l, Vertex *v) const;
};


#endif /*LINE_H_*/